Add 5/7 and 72/90
5/7 + 72/90 is 53/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 90 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 7 × 90 = 630,
5/7 = 5 × 90/7 × 90 = 450/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
72/90 = 72 × 7/90 × 7 = 504/630 - Add the two like fractions:
450/630 + 504/630 = 450 + 504/630 = 954/630 - 954/630 simplified gives 53/35
- So, 5/7 + 72/90 = 53/35
In mixed form: 118/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/7+72/90 5/14+72/90 15/7+72/90 5/21+72/90 25/7+72/90 5/35+72/90 35/7+72/90 5/49+72/90